> For whatever it's worth, I've always maintained that stealing the Watchpoint
> registers in this way was a pretty questionable hack to be avoided.
> Watchpoint
> registers are *optional* in MIPS64 and may not even exist. And yes, someone
> might want to use them for their intended purpose some day. However, please
> note that the EJTAG breakpoint registers are completely orthogonal to the
> watchpoint registers.
That is true, but in SB1, watchpoint registers can be used by the JTAG
debugger, and I do it all the time. It doesn't have the EJTAG
breakpoint registers, but rather overloads (I know, I know) use of the
watchpoint registers and has a mode bit for causing a debug exception
instead of a general exception when they are tripped.
Kip